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Cant able to get response from MCP2515

 
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faraz
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Cant able to get response from MCP2515
PostPosted: Mon Jun 30, 2008 9:55 am     Reply with quote
Hi , i am doing my master Thesis in a German Company. I have a problem with MCP2515 cCan controller, I write a code to interface with Renesas H8SX 1657 controller and i checked every think is right, Command, data and modes are correct but MCP2515 can not response.
i just want to get response from Can controller, in my case nothing is happening :( , i use bit banging instead of Usart .

my code is .

Code:
void init_MCP2515_communication(void)
{
  SPI_Init();
  }

unsigned char read_can_reg(unsigned char adr)
{
  unsigned char ret;
  SPI_CS_CAN = 0;                  //Enable Can controller
  SPI_WriteC(MCP_READ);           
  SPI_WriteC(adr);
  ret=SPI_Read();
  SPI_CS_CAN = 1;
  return ret;
}


void write_can_reg(unsigned char adr, unsigned char dat)
{
   SPI_CS_CAN = 0;
   SPI_WriteC(MCP_WRITE);
   SPI_WriteC(adr);
   SPI_WriteC(dat);
   SPI_CS_CAN = 1;
}

int main(void)   {
init_MCP2515_communication();


 write_can_reg(0x0F,0x80);                //set configuration mode
  write_can_reg(0x2A,3);                 //set cnf1 bits
  Test=0x00;
  write_can_reg(0x0F,0x00);                //set normal mode

Test=read_can_reg(0x2A);

return 0

}

Thanks very much if somebody help me out.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Jun 30, 2008 10:31 am     Reply with quote
This forum is for the CCS compiler and Microchip PIC microcontrollers.
It's not a Renesas H8 forum.

Here is the Renesas forum:
http://www.renesasrulz.com/forum/h8
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